Pedotransfer functions (PTF) are developed in order to determine some soil parameters whose measurements are laborious, expensive and time demanding. Besides that, they should not be applied for a wide range of soils due to errors that it might result for a large scope of soils other than those for which it was developed. The purpose of this research is to use the Rule Induction of Data Mining Techniques to increase the reliability, accuracy, coverage and scope of the PTF.